Diffuser fin



FIG. 1 is a front, left perspective view of the diffuser fin of the present invention, the opposite side being a mirror image thereof;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a front, right view thereof.

The broken lines on the top of the diffuser fin illustrate portions of the fin that form no part of the claimed design. The broken lines showing a car, in FIG. 8, illustrate environmental structure that forms no part of the claimed design. 

CLAIM The ornamental design for a diffuser fin, as shown and described. 